Abstract
Mössbauer-effect studies of in the cubic intermetallic Yb at temperatures 1.4-4.2 K and in external fields up to 44 kOe yield the following results: (a) Although the Yb ion is trivalent, no magnetic ordering is seen down to 1.4 K. (b) The temperature and field dependence of the magnetic hyperfine field and the induced electric field gradient show that the ground state in the presence of external field is not an isolated level. (c) All experimental observations can be reproduced by a cubic-crystalline-field calculation with parameters and . These give a ground state with and lying at 29 and 39 . These results are compared to predictions of a simple-point-charge-model calculation. Low-field spectra have been analyzed to give an ionic-spin-relaxation time sec.
- Received 22 February 1972
DOI:https://doi.org/10.1103/PhysRevB.6.1048
©1972 American Physical Society